Polymer modified bitumen emulsions (PMBEs)

Lesueur, Didier

doi:10.1533/9780857093721.1.25

Cited by 15 publications

(13 citation statements)

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“…This effect is reduced at the highest shear rates, when interactions are strongly weakened. As reported by Lesueur (2011), emulsions of polymer modified bitumens (PMBs) are generally coarser than their corresponding neat bitumen emulsions, as the dropletbreaking step is more difficult. In fact, the size of the polymer-rich inclusions are larger than the final droplet size, which generally limits the choice to PMBs with polymer content of the order of 3 wt.%.…”

Section: Stability and Rheology Of Modified Bitumen Emulsionsmentioning

confidence: 95%

“…Even though ''fresh'' emulsions can satisfactorily perform as such from the very first moment (compare the large differences in viscosities, at 60ºC, for neat bitumen and residues in Figure 5), Carrera et al (2009) demonstrated that in-service curing makes these binders evolve towards a better performance against the permanent deformation. In contrast, manufacturing of emulsions with other PMBs may be especially delicate, as processing temperature has to be very high for the PMBs to have a viscosity of about 200 mPa·s (Lesueur 2011).…”

Section: Rheology Of the Emulsion Residuesmentioning

confidence: 99%

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The development of polyurethane modified bitumen emulsions for cold mix applications

et al. 2014

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Bitumen emulsions stand for an alternative paving practice to the traditional hot-mix asphalts. In addition, modified bitumen emulsions show a better performance than unmodified ones. This work studies the feasibility of obtaining polyurethane modified bitumen emulsions, in which an isocyanate-functionalized polyol constitutes the bitumen modifier (in varying concentration from 1 to 4 wt.%). Storage stability and high in-service performance are evaluated by means of evolution of droplet size distribution (DSD) and rheology tests, respectively. Regarding the emulsion stability, the key factor seems to be the bitumen modifier concentration used to prepare the modified emulsions. Thus, for a selected 50 wt.% bitumen fraction, there is a limit concentration (between 1 and 2 wt.%) above which the emulsion becomes unstable under storage. Hence, this result limits the modifier content that can be used in the emulsion and the final level of modification achieved if compared to the original nonmodified emulsion. On the other hand, the rheological characterization conducted on the emulsion residues at 60ºC has shown an improved resistance to deformation.In terms of applicability, polyurethane modified bitumens allows for the obtaining of modified emulsions which can be prepared at much lower temperatures than those derived from other polymers.

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Section: Stability and Rheology Of Modified Bitumen Emulsionsmentioning

confidence: 95%

Section: Rheology Of the Emulsion Residuesmentioning

confidence: 99%

The development of polyurethane modified bitumen emulsions for cold mix applications

et al. 2014

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“…Paper [3] suggests three main ways of injecting a polymer into the emulsion: pre-mixing bitumen with a polymer, adding aqueous latex during emulsification, adding latex to the finished bitumen emulsion. It should be noted that each technique has its advantages and disadvantages.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…In addition, we also used cation-active emulsifiers manufactured by "CECA Arkema group" (France) and "AkzoNobel" (the Netherlands). To neutralize emulsifiers, hydrochloric acid with a density of 1.163 g/cm 3 and a concentration of 33 % was used; for modificationthe aqueous cationic latex Butonal NS 198, manufactured by BASF SE (Germany).…”

Section: The Materials Adopted To Assess the Effect Of Modification Of Bitumen Emulsions With Aqueous Cationic Latexmentioning

confidence: 99%

Estimating the effect of aqueous cationic latex from the class of thermal elastic plastics on the properties of bitumen emulsions

Zhdaniuk

Novakovska

2021

EEJET

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To produce cationic bitumen emulsions, bitumen is used, whose penetration is not lower than 90 mm-1. Such bitumen has a small plasticity interval, which leads to a deterioration in its heat resistance at elevated temperatures and narrows the scope of application of emulsions based on it. Based on the review of emulsion modification methods, the modification has been proposed that involves mixing the finished bitumen emulsions with aqueous cationic latex. The process of interaction between a bituminous emulsion and an aqueous cationic latex has been considered. A mechanism for the disintegration of the modified bitumen emulsion on the surface of mineral materials was proposed. The emulsifiers have been selected and the composition of the aqueous phase has been chosen based on the analysis of surface tension isotherms. The influence of the modification on the properties of bitumen emulsions was investigated. It was established that the main physicochemical characteristics of the interphase surface accept similar values for the aqueous phase and emulsions based on it. It has been proven that the introduction of aqueous cationic latex quite moderately affects the basic physical-mechanical properties of emulsions, which makes it possible not to change the main technological parameters when using them. It was established that increasing the concentration of the polymer in the emulsion has a positive effect on the physical-mechanical properties of the binder. With an increase in the concentration of the polymer to 6 % the softening temperature increases by 16 °C, elasticity is 74 %, and the holding capacity at minus 25 °C is approaching 100 %. Improving the physical-mechanical properties of residual binder as a result of emulsion modification could increase the durability of layers in a roadbed based on bitumen emulsions and expand the scope of their application in the construction and repair of motorways

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“…Існує безліч модифікацій бітумної емульсії, основ-ні з яких представлені в роботах [8][9]. Перевагами бітумної емульсії є утворення тонкої плівки, яка пе-решкоджає здуванню пилу з відвалу кар'єру протягом 10-12 місяців та її дешевизна (в 1,5 рази) в порівнянні з закріпленням полімерами [10].…”

Section: аналіз літературних даних та постановка проблемиunclassified